一种深棕色、中等粘度、高反应性、总异氰酸酯含量约为 31%、平均官能度 (1) 为 2.8 的聚亚甲基多苯基异氰酸酯。该产品的高官能度和粘度使其可用于制造 PUR 和 PIR 块状泡沫、夹层板，以及 PUR 和 PIR 连续层压制品。其高粘度有助于开发生产连续 PUR 和 PIR 泡沫所需的高粘度稳定混合物。增加的官能度带来改善的泡沫固化性、优异的强度性能和更佳的尺寸稳定性。
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